JP2573836Y2 - Automotive air conditioners - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner for a vehicle which automatically switches the temperature of blown air, the amount of blown air, an air inlet and an outlet so as to maintain the interior of the vehicle at a target temperature. In particular, the present invention relates to a device having improved performance during cool down.

[0002]

2. Description of the Related Art In recent years, air conditioners for automobiles have been designed to maintain the interior of a passenger compartment at a target temperature desired by an occupant.
There is a so-called auto air conditioner designed to improve occupant comfort. This auto air conditioner detects various changes in the cabin temperature due to changes in the outside air temperature, the amount of solar radiation, or changes in the occupants, and detects the temperature of the blown air, the amount of blown air, Inlet,
Switching of the air outlet and the like are automatically performed by an auto amplifier (control means). In some cases, air conditioning means is also provided on the rear seat side of the vehicle to realize comfortable air conditioning for both front and rear seats.

[0003] As is well known, an air conditioner for an automobile is as follows.
It has an intake unit that selectively takes in the vehicle interior air or the outside air, a cooler unit that cools the intake air, and a heater unit that heats the air and blows out the air to a predetermined position in the vehicle interior. ing.
The cooler unit is provided with an evaporator through which the refrigerant circulates, and the evaporator exchanges heat between the refrigerant and air blown into the vehicle interior to cool the air.

[0004] By the way, if a car is left unattended in the hot summer weather, it will be affected by solar radiation and the like, so that the temperature in the vehicle compartment will be much higher than the outside air temperature. In such a case, when the occupant operates the automatic air conditioner, the auto amplifier performs various calculations such as comparison between the target temperature set by the occupant and the vehicle interior temperature, and performs the temperature of the blown air, the amount of blown air, the air intake port. , And the air outlet is automatically switched to start the cooling air conditioning operation.

[0005]

In such a case, in order to increase the so-called cool-down performance in order to reduce the temperature of the passenger compartment to the target temperature in a short time, the components of the air conditioning system are generally increased in size. Although a method of increasing the capacity is adopted, it is inefficient to increase the size or the like on the assumption that the temperature in the vehicle interior is extremely high. In addition, some of the automatic air conditioners are configured to start in an outside air introduction mode when the vehicle interior temperature is equal to or higher than a predetermined value, and to switch to an inside air circulation mode after a predetermined time has elapsed. However, the interior of the cabin is extremely hot, so the hot air in the cabin is not sufficiently discharged, and no matter how much low-temperature air cooled by the evaporator is blown into the cabin, the cold air is not filled in And the vehicle interior cannot be quickly cooled down.

On the other hand, Japanese Unexamined Utility Model Publication No. 57-47409 discloses a device for driving a forced exhaust fan installed at the rear when the air conditioning means installed at the front of the vehicle compartment is set to the outside air introduction mode. However, this invention forcibly exhausts air in the outside air introduction mode, thereby avoiding a rise in the internal pressure of the vehicle interior and avoiding a decrease in the blowing efficiency of the blower fan. The purpose of the present invention is to prevent a change in the air volume due to the switching between and so as not to give an occupant an unnatural sensation. Therefore, the exhaust fan installed at the rear is used for adjusting the internal pressure in the vehicle interior, and it cannot be expected that the entire vehicle interior is rapidly cooled down. Further, in the embodiment of the present invention, when the target outlet air temperature of the air conditioner is equal to or lower than the predetermined value, the inside air circulation mode is set. Therefore, when the vehicle interior temperature is high, the exhaust fan does not operate and the hot air There is a disadvantage that no waste is discharged.

Japanese Utility Model Laid-Open Publication No. Sho 62-172612 discloses a rear seat air-conditioning unit provided at the rear of a passenger compartment, which is provided with a mechanism for exhausting air from the passenger compartment. According to this, when the difference between the vehicle interior temperature and the set value is larger than the predetermined value, the rear air conditioning unit exhausts the vehicle interior air for a predetermined time and then performs the cooling operation of the rear air conditioning unit. Become. However, although the hot air near the rear seats in the passenger compartment is discharged and the cooling effect increases, the cooling effect does not increase due to insufficient exhaustion of the hot air near the front seats in the passenger compartment compared to the vicinity of the rear seats. The air flow may not be smooth,
There is a disadvantage that it is not enough to rapidly cool down the entire vehicle interior.

[0008] The present invention has been made in view of such problems of the prior art, and an object of the present invention is to provide a case in which the temperature of a vehicle interior is extremely high under hot summer weather. It is an object of the present invention to provide an air conditioner for an automobile which can rapidly and surely cool the entire vehicle compartment without increasing the size and capacity of each component of the air conditioning system.

[0009]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides an inside air inlet for taking in air inside a vehicle, an outside air inlet for taking in outside air, and selecting the inside air inlet and the outside air inlet. A passenger compartment including an intake unit having an intake door for switching between intake modes such as an internal air circulation mode and an external air introduction mode by opening and closing the air intake mode, and a cooler unit having a built-in evaporator for cooling air taken in by the intake unit. A front-seat-side air-conditioning means provided in front, a suction port for sucking vehicle interior air, an inside air ventilation port for returning the sucked vehicle interior air to the vehicle interior, an exhaust ventilation port for discharging the sucked vehicle interior air outside the vehicle interior, and Intake unit having an air outlet switching door that selectively opens and closes an inside air outlet and the exhaust outlet to switch between an inside air mode and an exhaust mode A rear part of a vehicle interior, comprising: an evaporator for cooling air taken in by the intake unit and sent through the inside air blowing port; and a cooler unit having an air outlet for blowing air cooled by the evaporator into the vehicle interior. Rear air conditioning means, a vehicle interior temperature detecting means for detecting a vehicle interior temperature, and a temperature setting means for setting a target temperature in the vehicle interior, and blowing air to keep the interior of the vehicle at a target temperature. In a vehicle air conditioner that automatically controls the temperature of the front seat, if the difference between the vehicle interior temperature detected by the vehicle interior temperature detection means and the target temperature set by the temperature setting means is larger than a predetermined value, The intake door of the side air conditioner is controlled to be in the outside air introduction mode preferentially, and the air outlet switching door of the rear air conditioner is set to be in the exhaust mode. , An automobile air conditioning system, characterized in that it comprises a control means which is adapted blow outlet switching doors of at least rear air-conditioning unit is inside air mode.

[0010]

In the air conditioner for a vehicle configured as described above, when the air conditioning operation is started, the difference between the vehicle interior temperature detected by the vehicle interior temperature detecting means and the target temperature set by the temperature setting means is set. Is larger than the predetermined value, the intake door of the front air conditioning unit is set to the outside air introduction mode preferentially, and the air outlet switching door of the rear air conditioning unit is set to the exhaust mode. When the difference is smaller than the predetermined value, at least the air outlet switching door of the rear air conditioning unit is set to the inside air mode. Accordingly, when the temperature in the vehicle interior is extremely high, the front air conditioning unit is set to the outside air introduction mode preferentially and the rear air conditioning unit is set to the exhaust mode, and the difference is set to a predetermined value. At the time when the value becomes smaller than the value, at least the rear seat side air conditioner is efficiently controlled so as to switch to the inside air mode.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic configuration diagram of a vehicle incorporating an air conditioner for a vehicle according to an embodiment of the present invention, and FIG. 2 is a diagram of the vehicle shown in FIG. FIG. 3 is a schematic configuration diagram of the vehicle air conditioner according to an embodiment of the present invention, FIG. 4 is a control flow of the vehicle air conditioner shown in FIG. 3, and FIG. 5 is a transition graph of vehicle interior temperature showing the effect of the vehicle air conditioner shown.

First, the front seat side air conditioner 40 will be described. The front seat side air conditioner 40 shown in FIG. 3 is a so-called automatic air conditioner 40 and various doors 4 attached thereto.
An automatic amplifier (corresponding to control means) 65 for controlling the driving of 6, 54, 59 to 61 and the like is provided.

As is well known, the front-seat side air-conditioning means 40 includes an intake unit 41 for selectively taking in the vehicle interior air or the outside air, a cooler unit 42 for cooling the taken-in air, And a heater unit 43 that blows out to a predetermined position.

The intake unit 41 is provided with an inside air inlet 44 for taking in the vehicle interior air and an outside air inlet 45 for taking in the outside air. An intake door 46 for selectively opening and closing these inlets 44, 45 is opened and closed. It is provided freely. Also, the taken air is cooled by the cooler unit 42.
Is provided with a fan 47 driven by a fan motor M1. The cooler unit 42 has a built-in evaporator 48 through which the refrigerant circulates, performs heat exchange between the refrigerant and the air, and cools the air. This evaporator constitutes a cooling cycle together with a compressor, a condenser, an expansion valve and the like (not shown). The heater unit 43 is provided with a heater core 49 for heating air so as to have a bypass passage 50. Engine coolant is circulated through the heater core 49, and a mix door 54 is provided in front of the heater core 49.
Are provided to be freely opened and closed. When the mix door 54 is turned to the full hot position indicated by H in the drawing, the maximum heating operation is performed, and when the mix door 54 is turned to the full cool position indicated by C in the drawing, the maximum cooling operation is performed. Further, the mixing door 54 is moved to the intermediate position M.
In this case, the air from the cooler unit 42 passes through the heater core 49 and the bypass passage 50 at a ratio corresponding to the rotation position, and is adjusted to a predetermined temperature.

Downstream of the heater core 49, there is formed a mixing chamber 55 for mixing hot air and cold air, and a defrost port 56 for taking out air from the mixing chamber 55.
A vent port 57 and a foot port 58 are provided. Further, a defrost door 59, a vent door 60, and a foot door 61 for opening and closing these ports 56, 57, 58 are provided.
(Collectively referred to as “mode doors”) are provided to be freely opened and closed.

The air conditioning mode of the front seat side air conditioning means 40 includes a vent mode in which air is blown toward the upper body of the occupant, a foot mode in which air is blown toward the feet, a bi-level mode in which head air conditioning is performed, and removal of fogging in the window. There are various modes such as a differential mode. These air conditioning modes are realized by switching the positions of the mode doors 59 to 61.

During automatic control, the automatic air conditioner 40 detects changes in the vehicle interior temperature due to changes in the outside air temperature, the amount of insolation, or changes in the occupants by various sensors, etc., and blows air to keep the interior of the vehicle at the target temperature. The temperature, the amount of blown air, the air inlet and the outlet are automatically switched. The auto amplifier 65 includes an intake door actuator 66 for driving the intake door 46, a fan control circuit 67 for adjusting the voltage applied to the fan motor M1, and a mix door actuator 6 for driving the mix door 54.
8. A mode door actuator 69 for driving the mode doors 59 to 61 is connected. Also, the auto amplifier 6
5 includes an outside air sensor 12 for detecting the temperature outside the vehicle compartment, an inside air sensor 13 for detecting the temperature inside the vehicle compartment, an A / C switch 14 for operating an automatic air conditioner, a temperature setting switch 15 for setting a target temperature, and a display unit ( (Not shown)
An off switch 16 for stopping the fan and the compressor,
A differential switch 16 for selecting a differential mode, a REC switch 18 for selecting an inside air circulation mode, an FRE switch 19 for selecting an outside air introduction mode, and the like are connected. The auto-amplifier 65 processes input signals from sensors and the like by a built-in microcomputer, and controls the actuators 66, 68, 69 and the fan control circuit 67.

A rear seat side air conditioner 80 is provided at the rear of the passenger compartment.
Are provided, an intake unit 81 that takes in the air in the vehicle compartment, a cooler unit 86 that cools the taken air and blows it out to a predetermined position in the vehicle interior, and an exhaust unit 90 that exhausts the taken air as it is. It is configured by being connected.

The intake unit 81 has a suction port 82 for sucking vehicle interior air, an inside air vent 83 for returning the sucked vehicle interior air to the vehicle interior, and an exhaust air vent for discharging the sucked vehicle interior air to the outside of the vehicle interior. 84 are provided, and an air outlet switching door 85 for selectively opening and closing these air outlets 83 and 84 is provided. In order to send the taken air to the cooler unit 86 or the exhaust unit 90,
A fan 89 driven by the fan motor M2 is provided. The cooler unit 86 has a built-in evaporator 87 for cooling the air taken in by the intake unit 81 and sent through the inside air blowing port 83, and an outlet for blowing the air cooled by the evaporator 87 into the vehicle interior. 88 are formed. The exhaust unit 90 is provided with an exhaust duct 91 for sending air that has been taken in by the intake unit 81 and has passed through the exhaust air outlet 84.
And an exhaust port 92 for exhausting this air out of the vehicle compartment.

Further, the vehicle air conditioner 1 of the present embodiment.
0, the air amplifier switching door 8
5 is connected, and a signal from the fan control circuit 67 is also input to the fan motor M2. The auto-amplifier 65 processes various signals by a built-in microcomputer to comprehensively control the front-seat air conditioning unit 40 and the rear-seat air conditioning unit 80. When the A / C switch 14 is turned on to start the air conditioning operation, the auto amplifier 65
If the difference Ti-Ts between the vehicle interior temperature Ti detected in step (1) and the target temperature Ts set by the temperature setting means 15 is larger than the predetermined value A, the intake door 46 of the front seat air conditioning means 40 is driven preferentially. Is output to the intake door actuator 66 to close the inside air introduction port 44 and open the outside air introduction port 45, and a signal for driving the ventilation port switching door 85 of the rear seat air-conditioning means 80 to the ventilation port switching door actuator 93. Output and close the inside air vent 83 and exhaust vent 8
Open 4. When the difference is smaller than the predetermined value A, the auto amplifier 65 automatically controls the driving of the intake door 46 of the front seat air-conditioning means 40 based on various signals, and controls the rear seat air-conditioning means 80. A signal for driving the air outlet switching door 85 is output to the air outlet switching door actuator 93 to open the inside air outlet 83 and close the exhaust air outlet 84. Accordingly, when the temperature in the vehicle interior is extremely high, the air conditioning mode is preferentially set to the outside air introduction mode, the front air conditioning unit 40 is set to the cooling operation, and the air conditioning mode is set to the rear air conditioning unit 80. When the difference becomes smaller than a predetermined value, the front-seat air-conditioning means 40 is automatically controlled and set to the inside air mode, and the rear-seat air-conditioning means 80 is switched to the cooling operation.

Next, the vehicle air conditioner 1 of the present embodiment.
0 will be described based on the control flow shown in FIG.
When the A / C switch 14 is turned on, first, in step S
At 11, it is determined whether or not the off switch 16 is being pressed. Here, when the off switch 16 is pressed, the fan and the compressor are stopped, and the intake mode is fixed to the outside air introduction mode (step S20). If the off switch 16 has not been pressed, the next step S1
Proceed to 2. In this step S12, the differential switch 17
It is determined whether or not is turned on. Here the differential switch 1
When the switch 7 is turned on, the outlet is set to the defrost port 56, and the intake mode is set to the outside air introduction mode (step S20).
In this case, when the compressor is in the off state, it is switched to the on state. In step S12, the differential switch 1
If it is determined that No. 7 has not been turned on, step S1
Proceed to 3. In this step S13, the REC switch 1
It is determined whether or not 8 is on. Here, if the REC switch is in the ON state, the intake mode is normally set to the inside air circulation mode (step S21). In step S19), the intake mode is switched to the outside air introduction mode in order to prevent sudden window fogging (step S20). If it is determined in step S13 that the REC switch is in the off state, the process proceeds to step S14, and the on / off state of the compressor is determined. Here, when the compressor is in the off state, for example, in the economy mode in which the compressor is always turned off and automatic control is performed, the intake mode is set to the outside air introduction mode (step S20), and the operation is continued. In step S14,
If the compressor is on, the next step S
Proceed to 15.

In step S15, the inside air sensor 13
It is determined whether or not the difference Ti-Ts between the vehicle interior temperature Ti detected in step (1) and the target temperature Ts set by the temperature setting means 15 is larger than a predetermined value A. Here, Ti-Ts is a predetermined value A
If it is determined that the air conditioner is larger than the air conditioner, the outside air introduction mode is preferentially set to perform the cooling operation of the front seat air-conditioning unit 40, and the air conditioning mode is set to operate the rear seat air conditioning unit 80 (step S18). In step S15, Ti-Ts
Is determined to be smaller than the predetermined value A, the inside air mode is set and the rear air conditioning unit 80 is operated for cooling (step S16) and the front air conditioning unit 40 is automatically controlled (step S17). At the time of this automatic control, the outside air, the outside air,
Inside air and half outside air will be selected.

As described above, during the operation of the vehicle air conditioner 10 of this embodiment, the above control flow is always repeated, and when the cooling air conditioning operation is started, the vehicle interior temperature Ti and the target If the difference Ti-Ts from the temperature Ts is larger than the predetermined value A, the front air conditioning unit 40 is preferentially set to the outside air introduction mode to perform the cooling operation and the exhaust mode is set to the rear air conditioning unit 80. , And when the difference becomes smaller than the predetermined value A, the front air conditioning unit 40
Are automatically controlled and set to the inside air mode, and the rear seat side air conditioner 80 is switched to the cooling operation.

FIG. 5 shows that when the interior of the vehicle becomes extremely hot, the front air conditioning means is set to the outside air introduction mode (FRE mode) and the rear air conditioning means is set to the exhaust mode to cool down. The transition of the vehicle interior temperature at the time (solid line in FIG. 5) is determined by using only the front-seat side air-conditioning means in the internal air circulation mode (REC).
5 is a graph together with a case where the cooling operation is performed in the mode (mode) and the cooling operation is performed (indicated by a two-dot chain line in FIG. 5) and only the front seat side air conditioner is operated in the FRE mode (a broken line in FIG. 5). The hatched portion in the inside is the effect portion of this embodiment. In this way, even if the cabin is extremely hot in the hot summer months, the entire cabin can be cooled quickly and reliably without increasing the size and capacity of each component of the air conditioning system. Becomes

It should be noted that the present invention is not limited to the above-described embodiment, but can be variously modified within the scope of the claims for utility model registration. In this embodiment, when the difference between the vehicle interior temperature and the target temperature is larger than a predetermined value, the front seat air-conditioning unit is set to the outside air introduction mode preferentially, and the rear seat air-conditioning unit is set to the exhaust mode. Then, when the difference becomes smaller than a predetermined value, the front seat air-conditioning unit is automatically controlled to operate and the rear seat air-conditioning unit is switched to the inside air mode, but when the difference becomes smaller than a predetermined value. It is sufficient that at least the rear seat side air conditioner is configured to switch to the inside air mode, and the front seat side air conditioner may be fixed to the inside air mode, for example. Further, the operation control of the compressor can be appropriately modified.

[0026]

As described above, in the vehicle air conditioner of the present invention, the difference between the vehicle interior temperature detected by the vehicle interior temperature detecting means and the target temperature set by the temperature setting means is expressed by:
If the predetermined value is larger than the predetermined value, control is performed such that the intake door of the front air conditioning unit is set to the outside air introduction mode preferentially, and the ventilation port switching door of the rear seat air conditioning unit is set to the exhaust mode. Since the air conditioner has at least a control means for setting the air outlet switching door of the rear air conditioning means to be in the inside air mode, when the cooling air conditioning operation is started, the temperature of the vehicle interior becomes extremely high under the hot summer weather. Even when the air conditioner is located, the front air conditioning means is preferentially set to the outside air introduction mode and the rear air conditioning means is set to the exhaust mode, and when the difference becomes smaller than a predetermined value, at least Since the seat side air conditioner is controlled efficiently so as to switch to the inside air mode, the entire passenger compartment can be cooled quickly and reliably without increasing the size and capacity of each component of the air conditioning system. There is an effect that.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a vehicle incorporating a vehicle air conditioner according to an embodiment of the present invention.

FIG. 2 is a view of the automobile shown in FIG. 1 as viewed from behind (a front seat side air conditioning unit is not shown);

FIG. 3 is a schematic configuration diagram of an air conditioner for a vehicle according to an embodiment of the present invention.

FIG. 4 is a control flow chart of the vehicle air conditioner shown in FIG. 3;

FIG. 5 is a graph showing the effect of the vehicle air conditioner shown in FIG.

[Explanation of symbols]

40 ... Automatic air conditioner (front seat side air conditioning means) 41, 81 ... Intake unit 42, 86 ... Cooler unit 44 ... Inside air introduction port 45 ... Outside air introduction port 48, 87 ... Evaporator 65 ... Auto amplifier (control means) 80 ... Rear seat Side air-conditioning means 82 ... Suction port 83 ... Inside air blow port 84 ... Exhaust blow port 85 ... Blow port switching door 88 ... Blow outlet

Claims (1)

(57) [Scope of request for utility model registration] An inside air inlet for taking in air inside a vehicle, an outside air inlet for taking in outside air, and the inside air inlet.
And an intake unit (41) having an intake door (46) for selectively opening and closing the outside air introduction port (45) and switching an intake mode such as an inside air circulation mode or an outside air introduction mode, and the intake unit (41). A front-seat-side air-conditioning means (40) provided at the front of the vehicle cabin including a cooler unit (42) having a built-in evaporator (48) for cooling the taken-in air, and a suction port (82) for sucking air in the vehicle cabin An inside air vent (83) for returning the sucked cabin air to the cabin, an exhaust vent (84) for discharging the sucked cabin air out of the cabin, and the inside air vent (83) and the exhaust vent ( 84) to selectively open and close to switch between inside air mode and exhaust mode.
5) an intake unit (81), an evaporator (87) for cooling the air taken in by the intake unit (81) and sent through the inside air blowing port (83), and cooled by the evaporator (87). A rear air conditioner (80) provided at the rear of the vehicle interior, comprising a cooler unit (86) having an air outlet (88) for blowing the discharged air into the vehicle interior, and a vehicle interior temperature for detecting a vehicle interior temperature. In an air conditioner for automobiles, which has a detection means (13) and a temperature setting means (15) for setting a target temperature in the vehicle interior, and automatically controls the temperature of the blown air to keep the interior of the vehicle at the target temperature. The difference between the vehicle interior temperature detected by the vehicle interior temperature detection means (13) and the target temperature set by the temperature setting means (15),
If it is larger than the predetermined value, the intake door (46) of the front air conditioning means (40) is preferentially set to the outside air introduction mode, and the ventilation port switching door (85) of the rear air conditioning means (80) is set to the exhaust mode. Control means (65) that controls the air outlet switching door (85) of at least the rear air conditioning means (80) to be in the inside air mode when it is smaller than a predetermined value. Automotive air conditioner.